.popup {
    width:200px;
    position:absolute;
    background: #000000;
    background: rgba(0, 0, 0, 0.7);
    color:#fff;
}

.popup_n {
    position:absolute;
    width: 9px;
    height: 11px;
    opacity:0.7;
    top: -11px;
    left: 26px;
}: